I like musicals a lot more than you, it would seem. But I don't love them all. Regarding the choices on your list:

The Wizard of Oz - I love it for far too many reasons to detail here. Perhaps I'll write an article on it one day and send it your way. My favourite line: "Hearts will never be practical until they can be made unbreakable."

Jesus Christ Superstar - Not a fan. I'm not a fan of Lloyd Webber in general, to be honest.

The Greatest Showman - Adequate at best. My thoughts in detail are here.

The Sound of Music - I absolutely love this film. Again, requires an article to detail why. "You've brought music back into this house..." (weeps into beer)

Grease - Iconic and immensely entertaining.

Some of my favourites not mentioned above: Top Hat, Singin' in the Rain, Guys and Dolls, West Side Story, Mary Poppins, My Fair Lady, Oliver!, Cabaret, Moulin Rouge, and more recently La La Land.